hi again, well, i can get audio one-way using 'pd -noadc -sounddev 1'. It gets rid of the 'bus error' message for now. nick -- Dr Nick Fells, Music Department, University of Glasgow, Tel: +44 (0) 141-330 4096 Glasgow G12 8QQ Fax: +44 (0) 141-330 3518 UK. http://www.music.gla.ac.uk/~nick